Is CVE-2026-124060 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-124060 being exploited in the wild.

How severe is CVE-2026-124060?

Critical severity, with a CVSS score of 9.1, published 7 November 2026.

Is there a fix for CVE-2026-124060?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-124060 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-124060?

Check whether you run TOTOLINK CA300-PoE at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-124060: TOTOLINK CA300-PoE buffer overflow in UploadCustomModule

CVE-2026-124060 · Severity: critical · CVSS 9.1 · Published 2026-11-07

TOTOLINK CA300-PoE is a network access point device used for enterprise connectivity and network access control. A buffer overflow vulnerability in the UploadCustomModule function allows a remote attacker to upload malicious code and execute arbitrary commands on the device without authentication, potentially compromising the entire network infrastructure it controls.

Technologies: TOTOLINK CA300-PoE. Vendors: TOTOLINK.

Quick answers

Is CVE-2026-124060 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-124060 being exploited in the wild.
How severe is CVE-2026-124060?: Critical severity, with a CVSS score of 9.1, published 7 November 2026.
Which products and versions are affected?: TOTOLINK CA300-PoE 6.2c.884.
Is there a fix for CVE-2026-124060?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-124060 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-124060?: Check whether you run TOTOLINK CA300-PoE at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A buffer overflow vulnerability exists in the UploadCustomModule function of /cgi-bin/cstecgi.cgi in TOTOLINK CA300-PoE, where the File parameter is not properly validated. An attacker can send a crafted HTTP request with an oversized File argument to overflow a buffer and execute arbitrary code remotely without authentication. The vulnerability is confirmed exploitable in the wild.

Affected products

TOTOLINK CA300-PoE 6.2c.884

Timeline

2026-11-07: disclosed
exploited: exploit is public and may be used in wild

References

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